CVE-2026-74634
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Prevent subbuf order change when resizing is disabled Because ring_buffer_subbuf_order_set() frees buffer pages, we can't allow it when resizing is disabled. A non-consuming reader is at risk of use-after-free (rb_advance_iter()). Return -EBUSY on resize_disabled, matching ring_buffer_resize() behaviour.
Affected versions
Linux kernel versions
6.8
and later are affected. Fixed in
6.12.104,
6.18.45,
7.1.9,
7.2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-74634?
CVE-2026-74634 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.8 onward and has been patched in 6.12.104, 6.18.45, 7.1.9 and others. CVE-2026-74634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74634?
Yes. CVE-2026-74634 has been patched. Fixed versions include 6.12.104, 6.18.45, 7.1.9 and others. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74634 actively exploited?
No. CVE-2026-74634 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.